Tappet Construction [Lf]; Variable Valve Timing Mechanism Outline [Lf] - Mazda 2006 MX-5 Service Highlights

TAPPET CONSTRUCTION [LF]

• The tappet is a shimless tappet which is integrated with the shim.
• The tappet surface is phosphate-coated to smooth the attaching surface to the cam and improve abrasion
resistance.
• The valve clearance can be adjusted by replacing the tappet. There are 35 kinds of tappets depending on the
thickness. The tappet kind can be determined by the engraved identification mark (3 digits).
Tappet Specification.
Discernment mark
725—625
602—122
100—000
TAPPET
End Of Sie

VARIABLE VALVE TIMING MECHANISM OUTLINE [LF]

• A variable timing mechanism, which realizes optimum valve timing according to engine operation conditions by
continuously modifying the phases of the intake camshaft and crankshaft, has been adopted.
TORQUE
01–10–14
MECHANICAL
Tappet thickness (mm {in})
3.725—3.625 {0.1467—0.1427}
3.602—3.122 {0.1418—0.1229}
3.100—3.000 {0.1220—0.1181}
CAMSHAFT
VALVE STEM
CONTACT SURFACE
ENGINE WITH VARIABLE VALVE TIMING MECHANISM
LOW-MIDDLE SPEED ENGINE
ENGINE SPEED
The number of jumps (mm {in})
0.025 {0.00098}
0.02 {0.00078}
0.025 {0.00098}
TAPPET SECTIONAL VIEW
CAM LOB CONTACT
SURFACE
IDENTIFICATION MARK POSITION
HIGH SPEED ENGINE
E5U011012431N01
E5U110ZT5020
E5U011012111N04
E5U110ZT5021